Are ultra-large systems systems of systems?

Ivica Crnkovic. Are ultra-large systems systems of systems?. In Kevin J. Sullivan, Rick Kazman, editors, Proceedings of the 2nd international workshop on Ultra-large-scale software-intensive systems, ULSSIS@ICSE 2008, Leipzig, Germany, May 10-11, 2008. pages 57-60, ACM, 2008. [doi]

@inproceedings{Crnkovic08a,
  title = {Are ultra-large systems systems of systems?},
  author = {Ivica Crnkovic},
  year = {2008},
  doi = {10.1145/1370700.1370716},
  url = {https://doi.org/10.1145/1370700.1370716},
  researchr = {https://researchr.org/publication/Crnkovic08a},
  cites = {0},
  citedby = {0},
  pages = {57-60},
  booktitle = {Proceedings of the 2nd international workshop on Ultra-large-scale software-intensive systems, ULSSIS@ICSE 2008, Leipzig, Germany, May 10-11, 2008},
  editor = {Kevin J. Sullivan and Rick Kazman},
  publisher = {ACM},
  isbn = {978-1-60558-026-5},
}